Of the 38 attitudinal items, we excluded nine items because they were significantly modified because of lack of clarity (based on participant responses), after roughly half of the sample had participated in the study. Therefore, 29 items were used for further statistical analyses. Using an exploratory principal components analysis (PCA) (Jolliffe, 2002) based on varimax rotation with Kaiser Guttman normalization, we obtained factors for which we computed the mean scores for each ethnic group. The initial solution yielded nine factors with eigenvalues of more than 1.00, accounting for 61% of the cumulative variance in the group of questions. We excluded additional five items, which loaded on factors that were uninterpretable, or had factor loadings of less than 30. We reperformed the PCA on the remaining 24 items, which yielded a solution of eight components accounting for 64% of the cumulative variance.
